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Porphyrin Derivatives and Their Use in Photodynamic Therapy

US 7,244,841 Term ended
OverviewFamilyAssignmentsSources & methods

Term ended Dec 23, 2023 · High confidence

Filed Dec 23, 2003 as application 10/744,863 · Granted Jul 17, 2007
Base term, 20 years from filing
Today
20 years from filing
Term ended Dec 23, 2023
2003 2026
Clock starts
Dec 23, 2003
Term ended
Dec 23, 2023
Granted
Jul 17, 2007
base term after the term ends fee events Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
3 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
2
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.

This patent's term is its 20-year base term, with no adjustment for prosecution delay. All three maintenance fees were paid, so no fee lapse ended it. Confidence: High. from the record

How we calculated this date

One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Dec 23, 2003, when this application, 10/744,863, was filedDec 23, 2023High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustmentNone on fileno changeHigh confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events3 of 3 maintenance fees paidterm endedHigh confidence
Computed term endThe steps above, in orderDec 23, 2023High confidence

This family

US 7,244,841this patent
Dec 2023
Dec 2023
US 8,084,602In force
Apr 2027
Apr 2027
The applications whose file history this site holds. The family may have others.

Assignments

Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
RecordedAssignorAssigneeConveyance
Mar 19, 2004
reel/frame not recorded
Love, William; Rhys-williams, William; Brundish, Derek; Feng, Xiang Dong; Pugin, BenoitDestiny Pharma LimitedAssignment of Assignor's Interest
Mar 19, 2004
reel/frame not recorded
Love, William; Rhys-williams, William; Brundish, Derek; Feng, Xiang Dong; Pugin, BenoitSolvias AGAssignment of Assignor's Interest
Mar 19, 2004
Reel 15107, frame 570
Love, William; Brundish, Derek; Rhys-williams, William; Feng, Xiang Dong; Pugin, BenoitDestiny Pharma Limited; Solvias AGAssignment of Assignor's Interest

Sources

Google Patents · The patent document at USPTO · Assignment records at USPTO

USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup

Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.

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